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  • Flow equations for hamiltonians from continuous unitary transformations 

    Bartlett, Bruce (Stellenbosch : Stellenbosch University, 2003-03)
    ENGLISH ABSTRACT: This thesis presents an overview of the flow equations recently introduced by Wegner. The little known mathematical framework is established in the initial chapter and used as a background for the entire ...

  • Non-perturbative flow equations from continuous unitary transformations 

    Kriel, Johannes Nicolaas (Stellenbosch : University of Stellenbosch, 2005-12)
    The goal of this thesis is the development and implementation of a non-perturbative solution method for Wegner’s flow equations. We show that a parameterization of the flowing Hamiltonian in terms of a scalar function ...